← Area code 410
410-423 phone numbers
Numbers 410-423-0000 to 410-423-9999 are assigned to Teleport Communications America, LLC in Columbia, MD.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Numbers 410-423-0000 to 410-423-9999 are assigned to Teleport Communications America, LLC in Columbia, MD.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.